专利名称：Stem packing with slitted flexible polymer sleeve
发明人：Walter T. Roush
申请号：US06/459337新概念英语思维导图
afraid怎么读>职责英语申请日：19830120
公开号：US04426093A
公开日：什么是t恤衫
对不起英文怎么写
tightly
19840117
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摘要：An improved stem packing. In the preferred and illustrated embodiment, the packing for the stem is captured within a housing normally described as a bonnet asmbly, and is axially loaded by a cooperative jam nut and bushing. They axially load the top end of the stem packing, forcing it to expand radially inwardly and outwardly to grip the stem to al against stem and bonnet surfaces. Extrusion of packing material typically occurs. The improved version of stem packing apparatus in the preferred and illustrated embodiment is a tubular sleeve of relatively elongate lubricated plastic material having a plurality of partial circumferential parallel cuts in it, thereby decreasing the axial load required to achieve aling. The al material controllably expands controlled by the cuts, thereby achieving the desired internal and external al to prevent leakage. Torque required to rotate the stem is reduced, and extrusion of the al material is markedly reduced.
申请人：ROUSH; WALTER T.
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